CA1051653A - Apparatus for the application of coating materials to a moving web - Google Patents
Apparatus for the application of coating materials to a moving webInfo
- Publication number
- CA1051653A CA1051653A CA225,225A CA225225A CA1051653A CA 1051653 A CA1051653 A CA 1051653A CA 225225 A CA225225 A CA 225225A CA 1051653 A CA1051653 A CA 1051653A
- Authority
- CA
- Canada
- Prior art keywords
- pores
- bore
- porous member
- web
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
- B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
- B05C5/0279—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve independently, e.g. individually, flow controlled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
- B05C5/0266—Coating heads with slot-shaped outlet adjustable in length, e.g. for coating webs of different width
Landscapes
- Coating Apparatus (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An apparatus for coating a moving web with liquid through a porous member, the apparatus being adapted for different widths of web by a deckle rod slidable inwards and outwards in a bore to close and open a desired quantity of pores in the porous member.
An apparatus for coating a moving web with liquid through a porous member, the apparatus being adapted for different widths of web by a deckle rod slidable inwards and outwards in a bore to close and open a desired quantity of pores in the porous member.
Description
.
1~ 3 This invention relates -to an apparatus for the application . .
of coating materials in a liquid state to a moving web of the kind where the liquid is applied to the surface of the web through a porous member.
~ When coating webs it is often desirable to use the same ap~
-~- paratus to coat webs of different widths and the object of the in-vention is to provide means by which the width of the coating head , can be varied to suit different widths of web to be coated.
According to this invention we provide a coating head com-` 10 prising a porous member having at least one row of pores, the saidmember being provided between a reservoir of liquid and the web to be coated, the porous member including a bore e~tending at right angles to the pores and intersecting the pores in the porous mem-- ber, a deckle rod being provided to slide within the bore and adapted to make a precision fit therewith thereby closing the pores with which it is in contact. The said bore may be provided in a tube fast with the end wall of the reservoir, both the tube and , the end wall being drilled to provide the pores of the porous mem-ber. The effective width of the head of the porous member can be adjusted by pushing or withdrawing the rod into or from the bore.
Preferably the bore is accessible from each end of the porous member.
The or each deckle rod may be constructed with a slot along its length and this lot may be filled with a resilient material.
The purpose of this is that when the rod is inserted into the bore the resilient material urges the surface of the rod into contact with the sides of the bore thereby sealing the openingsin the pores.
One form of apparatus for carrying out the present inven-` tion is illustrated in the accompanying drawing, wherein:-Fig. 1 is a sectional front elevation;
` Fig. 2 is a sectional side eleva-tion, and Fig. 3 is a detail view.
; -2-;,,~
::
~51~i3 ~ eferring -to the drawing, the coating head comprises a hollow member having side walls 2 and 3 and an end or bottom wall 4 providing a chamber 6 forming a reservoir for the coating liquid.
A length of metal tubing 8 is welded as indicated at 9 to the bottom wall 4 and the wall 4 and tube 8 are together drilled so as to form a single row of pores 10 uniformly spaced along the length of the member interrupted by the hollow interior of the tube 8. Fig. 3 is a detail view showing the lower part of the , chamber 6, the end wall 4, the tube 8 and the drilled pores 10.
',-10 A horizontal bore 12 is drilled through each of the side walls 3, these bores 12 being in line with the ends of the tube 8 so that ~ -the bores 12 and the tube 8 form a continuous bore through the head. Deckle rods 14 are adapted to make a precision fit in the bore, one deckle rod 14 being provided for each end. Each deckle rod 12 has a longitudinal slot 16 filled with silicone rubber 18 or other resilient material to ensure that the surface of the rod 14 is pressed outwardly against the internal surface of the tube 8 so that the pores 10 are effectively closed when the rod is pushed into the tube 8. In this way the rod 14 is compressed to form a tight seal across any pore at which it is adjusted to cross axially. At the inlet to each bore 12, a split collar 15 is fixed to the wall 3 and a clamp 17 is provided to be screwed up tightly around the collar 15 to prevent accidental alteration of the posi-tion of the deckle rod during coating.
A handle 19 is provided at the end of each deckle rod.
This handle is aligned with the slot 16 in the deckle rod and ' therefore serves to indicate the position of the slot in relation to the drilled pores.
The web 20 is supported in the correct position adjacent to the porous member by an air supported belt 22. High pressure air passes through the apertures 24 in a box 26 to support the ., ~ ' "'.
; -3-- . , . ;
. ' :' 351&;53 ' belt 22. When the effective width of the porous member ls re-duced by the deckle rods 14 it is also necessary to blank off the rj air support jets 27 on the lower surface of the belt 22. This is ., , `~; done by means of a masking s-trip 28 which can be slldden into ;
'~ brackets 30 provided at the two ends of the top of the box 26.
A smoothing bar 32 of suitable length is used to suit the width of the web. The upper part of the chamber 6 is provided with a , filter 34 the edges of which are located in recesses 36. A
: sealing gasket 38 is provided for contact with the filter 34.
Instead of the tube 8, the lower end of the chamber may be filled with metal and the horizontal bore is made through the , metal. The pores 10 are drilled through the metal and the end wall 4.
Although the invention has been described with reference to an apparatus where the web moves horizontally, the invention ., `~ can also be applied to an apparatus where the web moves vertically.
- An apparatus to which the present invention can be applied is described in our Canadian Patent Specification 908,974 or our U.K. Patent Specification 1,423,823.
''-' .,'' .,. :
., ~
:'`.
~' 30 ., ., .
,'~ '- , ' ' '
1~ 3 This invention relates -to an apparatus for the application . .
of coating materials in a liquid state to a moving web of the kind where the liquid is applied to the surface of the web through a porous member.
~ When coating webs it is often desirable to use the same ap~
-~- paratus to coat webs of different widths and the object of the in-vention is to provide means by which the width of the coating head , can be varied to suit different widths of web to be coated.
According to this invention we provide a coating head com-` 10 prising a porous member having at least one row of pores, the saidmember being provided between a reservoir of liquid and the web to be coated, the porous member including a bore e~tending at right angles to the pores and intersecting the pores in the porous mem-- ber, a deckle rod being provided to slide within the bore and adapted to make a precision fit therewith thereby closing the pores with which it is in contact. The said bore may be provided in a tube fast with the end wall of the reservoir, both the tube and , the end wall being drilled to provide the pores of the porous mem-ber. The effective width of the head of the porous member can be adjusted by pushing or withdrawing the rod into or from the bore.
Preferably the bore is accessible from each end of the porous member.
The or each deckle rod may be constructed with a slot along its length and this lot may be filled with a resilient material.
The purpose of this is that when the rod is inserted into the bore the resilient material urges the surface of the rod into contact with the sides of the bore thereby sealing the openingsin the pores.
One form of apparatus for carrying out the present inven-` tion is illustrated in the accompanying drawing, wherein:-Fig. 1 is a sectional front elevation;
` Fig. 2 is a sectional side eleva-tion, and Fig. 3 is a detail view.
; -2-;,,~
::
~51~i3 ~ eferring -to the drawing, the coating head comprises a hollow member having side walls 2 and 3 and an end or bottom wall 4 providing a chamber 6 forming a reservoir for the coating liquid.
A length of metal tubing 8 is welded as indicated at 9 to the bottom wall 4 and the wall 4 and tube 8 are together drilled so as to form a single row of pores 10 uniformly spaced along the length of the member interrupted by the hollow interior of the tube 8. Fig. 3 is a detail view showing the lower part of the , chamber 6, the end wall 4, the tube 8 and the drilled pores 10.
',-10 A horizontal bore 12 is drilled through each of the side walls 3, these bores 12 being in line with the ends of the tube 8 so that ~ -the bores 12 and the tube 8 form a continuous bore through the head. Deckle rods 14 are adapted to make a precision fit in the bore, one deckle rod 14 being provided for each end. Each deckle rod 12 has a longitudinal slot 16 filled with silicone rubber 18 or other resilient material to ensure that the surface of the rod 14 is pressed outwardly against the internal surface of the tube 8 so that the pores 10 are effectively closed when the rod is pushed into the tube 8. In this way the rod 14 is compressed to form a tight seal across any pore at which it is adjusted to cross axially. At the inlet to each bore 12, a split collar 15 is fixed to the wall 3 and a clamp 17 is provided to be screwed up tightly around the collar 15 to prevent accidental alteration of the posi-tion of the deckle rod during coating.
A handle 19 is provided at the end of each deckle rod.
This handle is aligned with the slot 16 in the deckle rod and ' therefore serves to indicate the position of the slot in relation to the drilled pores.
The web 20 is supported in the correct position adjacent to the porous member by an air supported belt 22. High pressure air passes through the apertures 24 in a box 26 to support the ., ~ ' "'.
; -3-- . , . ;
. ' :' 351&;53 ' belt 22. When the effective width of the porous member ls re-duced by the deckle rods 14 it is also necessary to blank off the rj air support jets 27 on the lower surface of the belt 22. This is ., , `~; done by means of a masking s-trip 28 which can be slldden into ;
'~ brackets 30 provided at the two ends of the top of the box 26.
A smoothing bar 32 of suitable length is used to suit the width of the web. The upper part of the chamber 6 is provided with a , filter 34 the edges of which are located in recesses 36. A
: sealing gasket 38 is provided for contact with the filter 34.
Instead of the tube 8, the lower end of the chamber may be filled with metal and the horizontal bore is made through the , metal. The pores 10 are drilled through the metal and the end wall 4.
Although the invention has been described with reference to an apparatus where the web moves horizontally, the invention ., `~ can also be applied to an apparatus where the web moves vertically.
- An apparatus to which the present invention can be applied is described in our Canadian Patent Specification 908,974 or our U.K. Patent Specification 1,423,823.
''-' .,'' .,. :
., ~
:'`.
~' 30 ., ., .
,'~ '- , ' ' '
Claims (5)
1. Apparatus for applying coating material to a moving web having a coating head comprising a porous member having at least one row of pores, the said member being provided between a reservoir of liquid and the web to be coated, the porous member including a bore extending at right angles to the pores and inter-secting the said pores, a deckle rod being provided to slide within the bore and adapted to make a precision fit therewith, thereby closing the pores with which it is in contact.
2. Apparatus according to claim 1 wherein two aligned bores are provided, one being accessible from each end of the porous member and each provided with a deckle rod.
3. Apparatus according to claim 1 wherein the reservoir is a chamber, the end wall of which is adjacent to the moving web and a tube within the chamber which is fast with the said end wall provides the said bore.
4. Apparatus according to claim 3 wherein the said tube and end wall are drilled to provide the pores.
5. Apparatus according to claim 1 wherein the deckle rod is provided with a slot along its length the said slot being filled with resilient material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB17995/74A GB1503511A (en) | 1974-04-24 | 1974-04-24 | Apparatus for the application of coating materials to a moving web |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1051653A true CA1051653A (en) | 1979-04-03 |
Family
ID=10104818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA225,225A Expired CA1051653A (en) | 1974-04-24 | 1975-04-23 | Apparatus for the application of coating materials to a moving web |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1051653A (en) |
| GB (1) | GB1503511A (en) |
| ZA (1) | ZA752502B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2537739B2 (en) * | 1992-07-31 | 1996-09-25 | 三菱化学株式会社 | Die coater |
| KR100272064B1 (en) * | 1992-10-27 | 2000-12-01 | 미우라 아끼라 | Die coater |
| DE4400769C2 (en) * | 1994-01-13 | 1996-07-18 | Lohmann Therapie Syst Lts | Method and device for producing a flat dosage form with a preparation containing active pharmaceutical ingredients |
| US7507295B2 (en) | 2005-03-22 | 2009-03-24 | Nordson Corporation | Adhesive dispenser |
| DE202006014743U1 (en) | 2006-09-22 | 2006-11-23 | Nordson Corporation, Westlake | Device for applying hot-melt type adhesive comprises a nozzle opening communicating with a distribution channel using a number of outlet channels spaced from each other |
| ES2424166T3 (en) | 2006-09-22 | 2013-09-27 | Nordson Corporation | Apparatus for applying fluids such as adhesive, in particular hot melt adhesive |
| US8127711B2 (en) | 2007-07-05 | 2012-03-06 | Nordson Corporation | Mounting systems for an adhesive application system and methods for applying adhesive |
| US8640641B2 (en) | 2010-07-02 | 2014-02-04 | Nordson Corporation | Multi-slot applicator with automatic closing function |
| CN106573267B (en) | 2014-04-04 | 2020-02-14 | 惠普印迪戈股份公司 | Fluid application |
-
1974
- 1974-04-24 GB GB17995/74A patent/GB1503511A/en not_active Expired
-
1975
- 1975-04-18 ZA ZA00752502A patent/ZA752502B/en unknown
- 1975-04-23 CA CA225,225A patent/CA1051653A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1503511A (en) | 1978-03-15 |
| ZA752502B (en) | 1976-04-28 |
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